The name may be Gaelic (and pronounced “a-gwen”) but this gastropub’s specialty is all Scotch: Row after row of nearly 100 varieties fill the walls, and private “Scotch lockers” store regular patrons’ favorites. While novices will find familiar classics, even aficionados can explore widely, including Compass Box’s new range of excellent blends, some special old Scotches such as a 40-year-old Bunnahabhain, and such hard-to-find bottles as Alchemist Bruichladdich.